Only one word: EASY

Cheap

Scalable

The time is a perfect shard key

There are few tools and services

InfluxDB

database optimized to manage time series

telegraf to collect and push metrics

kapacitor to trigger alerts

InfluxDB outperformed Elasticsearch in all
three tests with 8x greater write throughput, while
using 4x less disk space when compared against
Elastic’s time series optimized configuration, and
delivering 3.5x to 7.5x faster response times for tested
queries.

Kapacitor

InfluxDB admin panel

To manage your data

Graphite

Demo time

https://github.com/gianarb/demo-devops-conf

When you start to work with "micro"services understand the
topology of your connections is really important
Time series can help you
If a graph shows two metrics that seem correlated that doesn't mean that they are related

That's it

A series of great tools to monitor your applications and
your infrastructure